Mathomatic is a portable, general-purpose computer algebra system (CAS) that can solve, differentiate, simplify, combine, and compare algebraic equations, perform standard, complex number, modular, and polynomial arithmetic, etc. It does some calculus and is very easy to compile/install, learn, and use. The symbolic math application with a simple command-line interface is designed to be a colorful algebra calculator that is reliable, responsive, and convenient to use. The symbolic math library is lightweight and easy to include in other software, due to being written entirely in C with no additional dependencies.

expect-lite is an quick and easy command line automation tool. Written in expect, it is designed to directly map an interactive terminal session into an automation script. expect-lite scripts use special character(s) at the beginning of each line to indicate the action. Basic expect-lite scripts can be created by simply cutting and pasting text from a terminal window into a script, and adding '>' '<' characters. No knowledge of expect is required. Expect-lite is targeted at the verification testing environment, and will produce a Pass/Fail result at the end of the script. However, its use is not limited to this environment. It includes a powerful debugger with breakpoints, step/skip, and the ability to copy/paste expect-lite lines right into a running script.

OpenNetAdmin provides a database managed inventory
of your IP network (IPAM). Each host can be tracked via a centralized AJAX-enabled Web interface that can help reduce tracking errors. It also has the ability to generate DHCP and DNS configuration for individual servers from the data stored in the database. There is a command line interface for batch scripting that can be accessed remotely or locally.

audiopreview is a command-line tool that plays
previews of many audio file types (Ogg, MP3, etc.),
video file types (AVI, MPEG, Real, etc.), and Internet
streams. It can also be used as a regular command-line media file player (i.e. play the files entirely like yauap or mpc123 would).

Taskwarrior (formerly known as task) is a command-line to do list manager. It is scope-limited to GTD functionality and features tags, colorful tabular output, reports and graphs, lots of commands, completion, 256-colors, themes, multi-user file locking, and recurring tasks.

JCmdLineProgress is a Java library to assist with progress reporting on the command line. Using simple hooks, a program can send progress messages and
status information to the command line. Also, text based "spinners" can be used to provide visual confirmation that a long running but quiet program is still running. A working example is provided.

Bashinator is a bash shell script framework. It provides flexible and powerful message handling that lets you print to stdout, log (to syslog or a logfile), and mail messages with a single message function. Exhaustive information is included in messages to ease debugging. This information includes timestamps, message severity, source file, line numbers, and function names. A facility for tracing the function call stack is provided. Sub-command output can be logged by capturing the stdout/stderr of external commands to a dedicated temporary logfile. The framework also provides lockfile handling.